Barb Warrior moves two spaces

[Turquoiside]

MY Settler keeps getting attacked by a barbarian warrior two spaces away. Once I move him, he runs across and kills my Settler. Besides the inhernet problem of not providing defense for the settler what is wrong here? There are no roads involved and the barbarian does not seem to have any promotions. Yet he is moving two spaces a turn! This is before Patch 3.17.

 

[DanF5771]

Amsterdam expanded its cultural borders --> the Warriors "1st move" was due to being expelled from your new land because you own the Great Wall.

 

[Carwyn]

The AI are cheating... well, you know! I've had AI warriors and spears move two moves in one turn many times, I just plan for it. They cheat!

Actually I suspect it has to do with how the AI moves are calculated - they have a movement period at the middle of the turn and at the end. Sometimes they seem to be able to move their guys on both periods, although they shouldn't be able to.